From 4397d810dd5d1d0f8453d6914e4b8c04e448b4ca Mon Sep 17 00:00:00 2001
From: Christian Segundo
Date: Sat, 7 Oct 2023 06:53:00 +0200
Subject: add le files

---
 Makefile.am  |  7 +++++++
 configure.ac | 19 +++++++++++++++++++
 krash.in     | 39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 65 insertions(+)
 create mode 100644 Makefile.am
 create mode 100644 configure.ac
 create mode 100644 krash.in

diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..8b45e33
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,7 @@
+bin_SCRIPTS = krash
+CLEANFILES = $(bin_SCRIPTS)
+
+install-exec-hook:
+	cd $(DESTDIR)$(bindir) && rm -f kubectl-node-crash && $(LN_S) krash kubectl-node-crash
+uninstall-hook:
+	cd $(DESTDIR)$(bindir) && rm -f kubectl-node-crash
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..3c9d22c
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,19 @@
+AC_INIT([krash], [1.0.0], [christian@segundo.io])
+AM_INIT_AUTOMAKE([foreign no-dependencies])
+AC_CONFIG_FILES([Makefile])
+
+AC_SUBST([CC])
+
+AC_PROG_LN_S
+AC_PATH_PROG([ENV_ABSOLUTE_PATH], [env])
+AS_IF([test x"$ENV_ABSOLUTE_PATH" = x""], [AC_MSG_ERROR([env is not available])])
+AC_SUBST([ENV_ABSOLUTE_PATH])
+
+AC_CHECK_PROG(BASH_CHECK,bash,yes)
+AC_CHECK_PROG(KUBECTL_CHECK,kubectl,yes)
+AS_IF([test x"$BASH_CHECK" != x"yes"], [AC_MSG_ERROR([bash is not available])])
+AS_IF([test x"$KUBECTL_CHECK" != x"yes"], [AC_MSG_ERROR([kubectl is not available])])
+
+AC_CONFIG_FILES([krash], [chmod +x krash])
+
+AC_OUTPUT
diff --git a/krash.in b/krash.in
new file mode 100644
index 0000000..aff12ec
--- /dev/null
+++ b/krash.in
@@ -0,0 +1,39 @@
+#!@ENV_ABSOLUTE_PATH@ bash
+set -eufo pipefail
+
+command -v kubectl >/dev/null 2>&1 || { echo 'Please install kubectl'; exit 1; }
+
+USAGE="Usage: $(basename "$0") <node-name> [-r|--reboot]"
+[ $# -eq 0 ] && { echo "$USAGE"; exit 1; }
+NODE_REBOOT=0
+NODE_NAME=${1:-}; shift
+
+if [[ $# -gt 0 ]]; then
+        if [[ "$1" =~ ^-r|--reboot$ ]]; then
+                NODE_REBOOT=1; shift
+        else
+                echo "$USAGE"; exit 1
+        fi
+fi
+
+kubectl apply -f - <<-EOF > /dev/null
+---
+apiVersion: v1
+kind: Pod
+metadata:
+  name: krash-${RANDOM}
+spec:
+  containers:
+    - name: krash
+      image: alpine:latest
+      securityContext:
+        privileged: true
+      command:
+        - /bin/sh
+        - -c
+        - |
+          sysctl -w kernel.panic=${NODE_REBOOT}
+          echo 'c' > /proc/sysrq-trigger
+  priorityClassName: system-node-critical
+  nodeName: ${NODE_NAME}
+EOF
-- 
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